<template>
    <div class="wrapper">
        <v-head class="head_sty"></v-head>
        <v-sidebar></v-sidebar>
        <div class="content-box" :class="{'content-collapse':collapse}">
         <v-tags></v-tags>
            <div class="content">
                <transition name="move" mode="out-in">
                    <keep-alive :include="tagsList">
                        <router-view id="main">
                        </router-view>
                    </keep-alive>
                </transition>
                <el-backtop target=".content"></el-backtop>
            </div>
        </div>
    </div>
</template>

<script>
import vHead from './Header.vue';
import vSidebar from './Sidebar';
import vTags from './Tags';
import bus from './bus';
export default {
  name:'Home',
    data() {
        return {
            tagsList: [],
            collapse: false
        };
    },
  components: {
    vHead,
    vSidebar,
    vTags
  },
    created() {
        bus.$on('collapse-content', msg => {
            this.collapse = msg;
        });

        // 只有在标签页列表里的页面才使用keep-alive，即关闭标签之后就不保存到内存中了。
        bus.$on('tags', msg => {
            let arr = [];
            for (let i = 0, len = msg.length; i < len; i++) {
                msg[i].name && arr.push(msg[i].name);
            }
            this.tagsList = this.items;
        });
        //禁止页面后退
        history.pushState(null, null, document.URL);
        window.addEventListener("popstate",function(e) {
          history.pushState(null, null, document.URL);
        }, false);
    },
    methods:{
    },
};
</script>
<style>
  *{
    margin: 0;
    padding: 0;
  }
  .head_sty {
    background-color: #20a0ff;
  }
  .content-box {
    position: absolute;
    left: 180px;
    right: 0;
    top: 70px;
    bottom: 0;
    padding-bottom: 30px;
    -webkit-transition: left .3s ease-in-out;
    transition: left .3s ease-in-out;
    background: #f0f0f0;
  }

  .content {
    width: 100%;
    height: 100%;
    padding: 10px;
    overflow-y: scroll;
    box-sizing: border-box;
  }

  .content-collapse {
    left: 65px;
  }

  .container {
    padding: 30px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
  }


</style>
